Block Timer Tracker

#!/usr/bin/env bash

# Block Timer Tracker for Claude Code
# Monitors Claude's 5-hour conversation block limit with countdown

# Read JSON from stdin
read -r input

# Extract session start time and current timestamp
session_start=$(echo "$input" | jq -r '.session.startTime // ""')
current_time=$(date +%s)

# Calculate elapsed time in seconds
if [ -n "$session_start" ]; then
  start_epoch=$(date -j -f "%Y-%m-%dT%H:%M:%SZ" "$session_start" +%s 2>/dev/null || echo "$current_time")
  elapsed=$((current_time - start_epoch))
else
  elapsed=0
fi

# 5-hour block = 18000 seconds
BLOCK_LIMIT=18000
remaining=$((BLOCK_LIMIT - elapsed))

# Convert to hours:minutes:seconds
hours=$((remaining / 3600))
minutes=$(((remaining % 3600) / 60))
seconds=$((remaining % 60))

# Calculate percentage remaining
if [ $BLOCK_LIMIT -gt 0 ]; then
  percent=$((remaining * 100 / BLOCK_LIMIT))
else
  percent=0
fi

# Color codes based on time remaining
if [ $percent -gt 50 ]; then
  # Green: > 2.5 hours remaining
  COLOR="\033[38;5;46m"
  ICON="✓"
elif [ $percent -gt 20 ]; then
  # Yellow: 1-2.5 hours remaining
  COLOR="\033[38;5;226m"
  ICON="⚠"
elif [ $percent -gt 0 ]; then
  # Red: < 1 hour remaining
  COLOR="\033[38;5;196m"
  ICON="⚠"
else
  # Expired
  COLOR="\033[38;5;160m"
  ICON="✗"
fi

RESET="\033[0m"

# Progress bar (20 chars)
bar_filled=$((percent / 5))
bar_empty=$((20 - bar_filled))
bar=""
for ((i=0; i<bar_filled; i++)); do bar+="█"; done
for ((i=0; i<bar_empty; i++)); do bar+="░"; done

# Format time display
if [ $remaining -gt 0 ]; then
  time_display=$(printf "%dh %02dm %02ds" $hours $minutes $seconds)
else
  time_display="EXPIRED"
fi

# Build statusline
echo -e "${COLOR}${ICON} Block: [${bar}] ${time_display} (${percent}%)${RESET}"

# Warning messages (stderr for alerts)
if [ $percent -le 10 ] && [ $percent -gt 0 ]; then
  echo "⚠ WARNING: Less than 30 minutes remaining in conversation block!" >&2
elif [ $remaining -le 0 ]; then
  echo "✗ BLOCK EXPIRED: Start new conversation to continue." >&2
fi

{
  "format": "bash",
  "position": "right",
  "colorScheme": "traffic-light",
  "refreshInterval": 1000
}